Burner for liquid fuel.



No. 651,900. Patented .lune I9, |900.

' P. E. THURUW.

BURNER 4Fu Lluum FUEL. (Appiiw'ion med nec. s1, 1891.)

(No Model.)

UNITED STATES PATENT OEFIQE.

PAUL EMIL'THUROW, OF HAMBURG, GERMANY.

BURNER FOR LIQUID FUEL.

SPECIFICATION forming part of Letters Patent N 0. 651,900, dated J' une19, 1900.

Application filed December 31, 1897. Serial No. 665,002. (No model.)

To @ZZ whom t may concern,.-

Beit known that I, PAUL EMIL THUROW, a subject of the German Emperor,and a resident of Hamburg, in the German Empire, have invented certainnew and useful Improvements in Burners for Liquid Fuel, of which thefollowing is a specification.

My invention relates to the utilization of liquid fuel, particularly forheating boilers.

In burners for burning liquid fuel-such as hydrocarbons, petroleum, andthe like-in which a jet of compressed air is used to carry the liquidfuel in the form ofspray into the furnace the compressed air, owing toits cooling while expanding in the pipe-conduit, reduces the temperatureat the base of the flame. To overcome this inconvenience, it has beenproposed to heat the air at the outlet of the jetnozzle; but this hasalso proved impracticable, owing to the undue expansion of the air andcorresponding loss in pressure or force to such an extent as toimperfectly atomize the liquid fuel. y

In using steam for atomizing the liquid fuel the inconvenience mentionedabove is practically obviated; but in many cases, and particularly inmarine-boiler furnaces, it is very difficult and also too expensive toprocure the sufcient amount of steam necessary for this purpose.

This invention has for its object a construction of burner whereby theuse of air-pressure or steam as atomizing agents is dispensed with andthe vapor of a suitable volatile combustible oil, as a hydrocarbon oilunder theV required pressure, is used, the oil thus serving also as afuel. The necessary amount of oxygen indispensable for a perfectcombustin may be led into the flame separately or together with the jetof vapor acting as the atomizing means for the liquid fuel.

My invention is illustrated in the accompanying drawing, wherein theburner is shown in longitudinal sectional elevation.

The burner consists of three pipes or nozzles a, b, and c, puttogetherand screwed upon one another in the manner shown. The funnel-sh aped ortrumpet-mouthed outlet end of the innermost tube a exceeds in diameterthat of the outlet ends of the nozzles h and c. By screwing the saidtubes a, b, and c more or less into one another the relative positionsof the said tubes may be altered, so as to regulate the width of theiroutlet-openings.

The liquid fuel enters through the neck c into the nozzle c, while thevapor for atomiz ing the liquid fuel is forced with a suiiicientpressure through the channel b and the chamber d', formed by thescrew-cap d, into thenozzleb. Theliquidfuelescapingthrough theoutlet-opening of the nozzle c is atomized by the combustible vapordriven through the nozzle b and is carried in the form of spray inthemidst of the fire, so as to apply the flame to the surfaces of theboiler. The oxygen or atmospheric air necessary for a perfect orcomplete combustion is supplied through the tube a.

Having fully described my invention, what I claim, and desire to secureby Letters Pat-l ent, is

A burner for liquid fuel, comprising an internally-threaded cup-shapedbase provided with an axial threaded bearin g, and an external nozzleclosed at its inner end and screwed to the base to form a chamberbetween the two, an internal open-ended nozzle screwed axially into theclosed end of the external nozzle, means for supplying liquid fuel and acombustible vapor under pressure to the outer nozzle and the chamber inrear thereof, respectively, and an air-supply pipe extending axiallythrough the inner nozzle and screwed into the aforesaid axial bearing inthe base, said air-tube provided with a ilaring mouth at its outletextending over the outlets of the outer and inner nozzles, for thepurpose set forth.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 15th day of December, 1897.

PAUL EMIL THUROW. Witnesses:

ALEXANDER SPEGHT, E. H. L. MUMMENHOEE.

